<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>title</title>
    <style>
        .index {
            width: 600px;
            height: 300px;
            background-color: blue;
        }

        .common {
            color: #fff;
        }
    </style>
</head>

<body>
    <div class="index">
        我是index页面
    </div>
</body>

<script>
    console.log('index-page')
</script>

</html>